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LM22680-Q1 Folha de dados(PDF) 8 Page - Texas Instruments |
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LM22680-Q1 Folha de dados(HTML) 8 Page - Texas Instruments |
8 / 27 page LOGIC OSC + - TYPE III COMP + - 1.285V & Soft-Start INT REG, EN,UVLO GND RT/SYNC SW BOOT VIN EN FB VIN VOUT Error Amp. PWM Cmp. Vcc ILimit LM22680, LM22680-Q1 SNVS595L – SEPTEMBER 2008 – REVISED NOVEMBER 2014 www.ti.com 7 Detailed Description 7.1 Overview The LM22680 device incorporates a voltage mode constant frequency PWM architecture. In addition, input voltage feedforward is used to stabilize the loop gain against variations in input voltage. This allows the loop compensation to be optimized for transient performance. The power MOSFET, in conjunction with the diode, produce a rectangular waveform at the switch pin, that swings from about zero volts to VIN. The inductor and output capacitor average this waveform to become the regulator output voltage. By adjusting the duty cycle of this waveform, the output voltage can be controlled. The error amplifier compares the output voltage with the internal reference and adjusts the duty cycle to regulate the output at the desired value. 7.2 Functional Block Diagram 8 Submit Documentation Feedback Copyright © 2008–2014, Texas Instruments Incorporated Product Folder Links: LM22680 LM22680-Q1 |
Nº de peça semelhante - LM22680-Q1 |
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Descrição semelhante - LM22680-Q1 |
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